地震地质 ›› 1995, Vol. 17 ›› Issue (3): 193-203.

• 科研简报 •    下一篇

华北、扬子板块碰撞后热演化史的初步研究

李齐1, 陈文寄1, 马宝林1, 王清晨2, 孙敏3   

  1. 1. 国家地震局地质研究所, 北京 100029;
    2. 中国科学院地质研究所, 北京 100029;
    3. 香港大学地球科学系, 香港
  • 收稿日期:1995-05-31 出版日期:1995-09-06 发布日期:2009-11-25
  • 基金资助:

    国家自然科学基金(49132040)

THERMAL EVOLUTION HLSTORY AFTER COLLISION OF NORTH CHINA PLATE WITH YANGTZE PLATE

Li Qi1, Chen Wenji1, Ma Balin1, WangQingchen2, Sun Min3   

  1. 1. Institute of Geology, SSB, Beijing 100029;
    2. Institute of Geology, Chinese Academy of Sciences, Beijing 100029;
    3. Department of Earth Sciences, Hong Kong University, Hong Kong
  • Received:1995-05-31 Online:1995-09-06 Published:2009-11-25

摘要:

对采自苏北-胶南-大别高压变质构造混杂岩带的片麻岩、糜棱岩和郯庐断裂带上的片麻岩中9个钾长石进行了40Ar-39Ar年龄测定和多重扩散域(MDD)模式处理,9个样品的热演化史表明上述地区存在5个不同的快速冷却时段,并就其可能的构造含义,提出了华北与扬子板块碰撞后的折返历史过程。

关键词: 变质带, 热历史, 地质年代测定, MDD模式

Abstract:

40Ar-39Ar analyses and MDD(multiple diffusion domain)model treatements were performed for 9 K-feldspar samples.They were collected from gneiss and mylonite of North Jiangsu-Jiaonan-Dabie tectonic melange belt and Tancheng-Lujiang fault zone.The thermal evolution history exhibits five fast ccoling stages found in these samples.In relation with their possible tectonic implications a recovery process after the collision of the North China plate with the Yangtze plate is suggested here.

Key words: Metamorphic belt, Themal history, Geological, Geological age determina-tion, MDD moddel